Method of making wrought articles.



J. H. DODS. METHOD OI MAKING WROUGHT ARTICLES.

APPLICATION FILED MAY 6, 1909.

Patented Dec 7, 1909.

6. @MZZ OFFICE.

JOHN H. DODS, F LAWRENCE, KANSAS.

METHOD OF MAKING WBOUGHT ARTICLES.

Specification of Letters Patent.

I-atented Dec. "3, 1909.

Application filed May 6, 1909. Serial No. 494,255

To all whom it may concern:

Be it known that I, J OHN H. Dons, a citi- Zen of the United StatesofAmerica, residingin Lawrence, in the county of Douglas and State ofKansas, have invented certain new and useful Improvements in Methodsused in carrying out my method.

of Making WVrought Articles, and of which the followin is a full, clear,and exact description, reference being had to the accompanying drawings,forming part of this specification.

My invention relates to a method of making wrought articles, and in thecarrying out of which the f pipe or segregated inner portion of ingotsmay be removed for the purpose of rendering the wrought articles freefrom pipe flaws as distinguished from wrought. articles produced fromingots in which the pipe is permitted to remain and in which wroughtarticles there is liable to be present serious flaws, as a cons quenceofthe metal not being compact or homogeneous throughout the wroughtarticle.

Figure I is a perspective view of an ingot as it appears after the firstpassage through a set of rolls in carrying out my method. Fig. II' is aperspective view of the ingot as it appears after one or 'more passesthrough a set of rolls tending toward separation of the central ,or pipeportion of the ingot from the main body of the ingot. F III is aperspective view of the bloom sections as in carrying out my method theyappear after the final pass of the blooming mill, and showing thecentral portion containing the pipe flaws of the ingot cut out andseparated from the blooms. Fig. IV is an elevation of a rolling millsuch as may be In carrying out my method, I take an ingot properlyheated and pass it a plurality of times between a set of rolls in arolling mill that are provided with retaining flanges and cutting orseparating flanges, the former flanges of the rolls being of service inlimiting the lateral movement of'the body of metal during the rollingoperation, and the latter flanges performing the office in a gradualmanner of crowing the outer portions of the body of metal outwardlytoward the retaining flanges, while the central portion or pipecontaining portion of the body of metal remains between the separatingor cutting flanges and is gradually lessened in cross section to befinally severed from the outer portions, whereby the outer portions fromwhich wrought articles are to be made, are, as they emerge' from therolls, after the final pass, in a flawless condition.

In rolling ingots in accordance with my improvement, I preferably use arolling mill such as is illustrated in Fig. IV, and of which a briefdescription will next be given.

1 designates the standards of the rolling mill, in which are journaledthe rolls 2, 3, and 4.

These rolls are provided respectively withretaining flanges 2, 3,andfil, that subdivide the spaces between the rolls into passageways A,B, O, D, and E. The sections of the rolls between which the passageway Ais located are cylindrical in shape, in order that the first passlof aningot may be made through the passageway A for the purpose of renderingthe-ingot of a nearly square shape in cross section, as illustrated inFigs. I and IV, wherein the ingot is designated by the letter X and itspipe by the letter w.

The section of the roll 2 that surrounds the cylindrical roll sectionimmediately beneath it is provided with a central separating flange 2that is adapted to operate upon the ingotwhen it is passed through thepassageway B and whereby the initial act in the separation of the pipefrom the ingot is performed. The sections of the rolls between which thepassageway G is located are provided with a pair of V-shaped separatingflanges 3 and 4 that act to cut into the ingot as it is passed throughthe passageway C and also to force the outer portions of the body ofmetal outwardly toward the retaining flanges of said roll sections. Theingot, after the pass through the passageway C, is in the conditionillustrated in Fig. II, and comprises the two outer portions Y and thecentral portion Z, which at this time remain unsevered from the twoouter portions. The ingot is then passed through the passageway D inorder that. the pair of separating flanges 3 of the roll 8 and acorresponding pair of separating flanges 2 of the roll 2 may opera ateupon the ingot in the same manner as it was operated upon when the passwas made through the passageway C. The passagestep in carrying out themethod is by the pass of the ingot through the passageway E betweensections of the rolls 3 and 4 that are provided with separating flanges3 and P, which extend into close proximity to each other and areseparated by grooves 3 and 4, through which the central or pipe portionZ ofthe ingot passes, while the outer portions Y of the ingot passthrough the spaces between the se aratin flanges and the retainingflanges o the rol%sections mentioned. As this final pass of the ingotthrough the rolls takes place, the central pipe portion of the ingot isseparated from the outer portion-s, thus producing wrought members thatare free from pipe flaws and which may be then further rolled for theproduction of wrought articles of any description it may be desired toproduce.

I claim I 1. The improved method herein described of making wroughtarticles, which'consists in casting an ingot larger in cross sectionthan is necessary for the wrought article tobe produced, then rollingthe ingot to spread its outer portion from lts central pipe portion andexpose the pipe portion, then seyering the outer portion from the pipeportion, and finally reducing the outer portion.

2. The improved method herein described 7 of making wrought articles,which'consists in casting an ingot larger 1n cross section than isnecessary for the wrought article 'to be produced,- then rolling theingot longitudinally to separate its outer portlon from its central pipeportion and expose the pipe ortion, then severing the' outer portion iror n the pipe portion,-.and finally reducing the outer portion.

